SmogRank / History / March 17, 2024
Most polluted cities on March 17, 2024
1,581 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 276.0 µg/m³. Each city's own local calendar day.
Bad-air episodes during March 17, 2024. All episodes.
← N'Djamena 276.0 µg/m³
200 µg/m³15 WHO 24-hour guideline
- 1N'DjamenaN’Djaména, Chad 40218.4×
- 2Mae SaiChiang Rai, Thailand 28714.1×
- 3Lahorelow-cost sensorsPunjab, Pakistan 2179.5×
- 4PhayaoPhayao, Thailand 2129.1×
- 5Chiang RaiChiang Rai, Thailand 2008.3×
- 6LampangLampang, Thailand 1937.7×
- 7LamphunLamphun, Thailand 1877.1×
- 8Dhakalow-cost sensorsDhaka Division, Bangladesh 1806.4×
- 9DelhiDelhi, India 1806.4×
- 10Chiang MaiChiang Mai, Thailand 1786.3×
- 11LoeiLoei, Thailand 1725.7×
- 12AshgabatAshgabat, Turkmenistan 1695.4×
- 13Kathmandulow-cost sensorsBagmati Province, Nepal 1655.0×
- 14MukdahanMukdahan, Thailand 1634.8×
- 15PhraePhrae, Thailand 1614.6×
- 16Mae SotTak, Thailand 1604.5×
- 17Amnat CharoenAmnat Charoen, Thailand 1594.5×
- 18Ubon RatchathaniUbon Ratchathani, Thailand 1584.4×
- 19YasothonYasothon, Thailand 1523.8×
- 20SukhothaiSukhothai, Thailand 1523.8×
- 21UttaraditUttaradit, Thailand 1493.7×
- 22Vientianelow-cost sensorsVientiane Prefecture, Laos 1493.7×
- 23Karachilow-cost sensorsSindh, Pakistan 1483.6×
- 24Udon ThaniUdon Thani, Thailand 1463.6×
- 25KalasinKalasin, Thailand 1443.5×
- 26Wan ChaiWan Chai, Hong Kong 1383.4×
- 27PhichitPhichit, Thailand 1373.3×
- 27Chai NatChai Nat, Thailand 1373.3×
- 29KigaliKigali, Rwanda 1323.2×
- 30Nong Bua LamphuNong Bua Lamphu, Thailand 1313.2×
- 31Roi EtRoi Et, Thailand 1313.2×
- 32Nakhon SawanNakhon Sawan, Thailand 1303.1×
- 33YangonYangon, Myanmar 1283.1×
- 34Islamabadlow-cost sensorsIslamabad, Pakistan 1273.1×
- 35Sing BuriSing Buri, Thailand 1253.0×
- 36Khon KaenKhon Kaen, Thailand 1243.0×
- 37GuangzhouGuangdong, China 1243.0×
- 38HanoiHanoi, Vietnam 1233.0×
- 39Sakon NakhonSakon Nakhon, Thailand 1233.0×
- 40Si Sa KetSi Sa Ket, Thailand 1212.9×
- 41MumbaiMaharashtra, India 1182.8×
- 42PhetchabunPhetchabun, Thailand 1172.8×
- 43TaibaoTaiwan, Taiwan 1162.8×
- 44ErlinTaiwan, Taiwan 1152.7×
- 45Banja LukaSrpska, Bosnia and Herzegovina 1102.6×
- 46Almatylow-cost sensorsAlmaty, Kazakhstan 1092.6×
- 47ErlunTaiwan, Taiwan 1082.6×
- 48Lop BuriLopburi, Thailand 1072.5×
- 49BeigangTaiwan, Taiwan 1052.5×
- 50LazarevacCentral Serbia, Serbia 1042.4×
- 50HyderabadTelangana, India 1042.4×
- 52BakuBaki, Azerbaijan 1032.4×
- 53RabinalBaja Verapaz, Guatemala 1022.4×
- 54ShanghaiShanghai, China 992.3×
- 55PančevoVojvodina, Serbia 972.2×
- 56TolucaMéxico, Mexico 962.2×
- 57ChaiyaphumChaiyaphum, Thailand 962.2×
- 57Mong KokYau Tsim Mong District, Hong Kong 962.2×
- 59RatchaburiRatchaburi, Thailand 962.2×
- 59Si Maha PhotPrachin Buri, Thailand 962.2×
- 61DouliuTaiwan, Taiwan 962.2×
- 62Puerto VarasLos Lagos Region, Chile 952.2×
- 63ChaozhouTaiwan, Taiwan 932.1×
- 64Suphan BuriSuphan Buri, Thailand 932.1×
- 64Puente AltoSantiago Metropolitan, Chile 932.1×
- 66ZhushanTaiwan, Taiwan 922.1×
- 67TainanTaiwan, Taiwan 922.1×
- 68YuanlinTaiwan, Taiwan 922.1×
- 68ShulinTaipei, Taiwan 922.1×
- 68Chiayi CityTaiwan, Taiwan 922.1×
- 71ZemunCentral Serbia, Serbia 922.1×
- 72Prachin BuriPrachin Buri, Thailand 912.1×
- 72VictoriaCentral and Western, Hong Kong 912.1×
- 74FengshanTakao, Taiwan 912.0×
- 75TaoyuanTaiwan, Taiwan 902.0×
- 76Santa Anita - Los FicusLima region, Peru 902.0×
- 77ColomboWestern Province, Sri Lanka 902.0×
- 78ToufenTaiwan, Taiwan 902.0×
- 78XinyingTaiwan, Taiwan 902.0×
- 80HsinchuTaiwan, Taiwan 892.0×
- 80ZhubeiTaiwan, Taiwan 892.0×
- 82SurinSurin, Thailand 892.0×
- 82NeiliTaiwan, Taiwan 892.0×
- 82QuillotaValparaiso, Chile 892.0×
- 85BelgradeCentral Serbia, Serbia 881.9×
- 85Ulan BatorUlaanbaatar, Mongolia 881.9×
- 87Tuen MunTuen Mun, Hong Kong 881.9×
- 87ShenyangLiaoning, China 881.9×
- 89SremčicaCentral Serbia, Serbia 871.9×
- 90Khlong LuangPathum Thani, Thailand 871.9×
- 90ZhudongTaiwan, Taiwan 871.9×
- 90OsornoLos Lagos Region, Chile 871.9×
- 93QuinteroValparaiso, Chile 851.8×
- 94Nong KhaemBangkok, Thailand 851.8×
- 94New Taipei CityTaipei, Taiwan 851.8×
- 96TaichungTaiwan, Taiwan 851.8×
- 97Sham Shui PoSham Shui Po District, Hong Kong 851.8×
- 97Puerto MonttLos Lagos Region, Chile 851.8×
- 99KaohsiungTakao, Taiwan 841.8×
- 100DaxiTaiwan, Taiwan 841.8×
- 100Tai PoTai Po, Hong Kong 841.8×
- 100SantiagoSantiago Metropolitan, Chile 841.8×
- 100HualpénBiobio, Chile 841.8×
- 104YongkangTaiwan, Taiwan 841.8×
- 105MiskolcBorsod-Abaúj-Zemplén, Hungary 831.8×
- 105Nakhon NayokNakhon Nayok, Thailand 831.8×
- 105NantouTaiwan, Taiwan 831.8×
- 108PuliTaiwan, Taiwan 831.7×
- 109ObrenovacCentral Serbia, Serbia 831.7×
- 110Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand 821.7×
- 111HimejiHyōgo, Japan 821.7×
- 112Bang Khun ThianBangkok, Thailand 821.7×
- 112HigashinozoeHyōgo, Japan 821.7×
- 114SarajevoFederation of B&H, Bosnia and Herzegovina 821.7×
- 115BuziTaiwan, Taiwan 811.7×
- 116MiaoliTaiwan, Taiwan 811.7×
- 116TalaganteSantiago Metropolitan, Chile 811.7×
- 118Addis AbabaAddis Ababa, Ethiopia 801.7×
- 118Kakogawachō-honmachiHyōgo, Japan 801.7×
- 120SaraburiSaraburi, Thailand 801.6×
- 120ChanghuaTaiwan, Taiwan 801.6×
- 122PhetchaburiPhetchaburi, Thailand 801.6×
- 122Sai MaiBangkok, Thailand 801.6×
- 124TocopillaAntofagasta, Chile 801.6×
- 124La UniónLos Ríos Region, Chile 801.6×
- 124TatsunoHyōgo, Japan 801.6×
- 127BaghdadBaghdad, Iraq 801.6×
- 128Buri RamBuriram, Thailand 791.6×
- 129SuzakaNagano, Japan 791.6×
- 129HandaAichi, Japan 791.6×
- 129Khan Na YaoBangkok, Thailand 791.6×
- 129Saphan SungBangkok, Thailand 791.6×
- 133OnoHyōgo, Japan 791.6×
- 133ConcónValparaiso, Chile 791.6×
- 135KurashikiOkayama, Japan 781.6×
- 136Viña del MarValparaiso, Chile 781.6×
- 137IkarugaHyōgo, Japan 771.5×
- 138Bang KapiBangkok, Thailand 771.5×
- 138San CarlosÑuble, Chile 771.5×
- 140AranyaprathetSa Kaeo, Thailand 771.5×
- 140Kwai ChungKwai Tsing District, Hong Kong 771.5×
- 140AmagasakiHyōgo, Japan 771.5×
- 143YawataKyoto, Japan 771.5×
- 144Phra PradaengSamut Prakan, Thailand 761.5×
- 144TenriNara, Japan 761.5×
- 144TaharaAichi, Japan 761.5×
- 147Haskovolow-cost sensorsHaskovo, Bulgaria 761.5×
- 148XizhouTaiwan, Taiwan 761.5×
- 148Asunciónlow-cost sensorsAsuncion, Paraguay 761.5×
- 150Nong ChokBangkok, Thailand 761.5×
- 150PljevljaPljevlja, Montenegro 761.5×
- 152NishinomiyaHyōgo, Japan 761.5×
- 152IrumaSaitama, Japan 761.5×
- 154BangkokBangkok, Thailand 751.5×
- 154AkashiHyōgo, Japan 751.5×
- 154HualquiBiobio, Chile 751.5×
- 157TaipeiTaiwan, Taiwan 751.5×
- 157XizhiTaipei, Taiwan 751.5×
- 159Dimitrovgradlow-cost sensorsHaskovo, Bulgaria 751.5×
- 159ChillánÑuble, Chile 751.5×
- 161Bueng KumBangkok, Thailand 751.5×
- 162TratTrat, Thailand 741.4×
- 162GotembaShizuoka, Japan 741.4×
- 164HōryūjiNara, Japan 741.4×
- 165Nakhon PathomNakhon Pathom, Thailand 741.4×
- 166Tsuen WanTsuen Wan, Hong Kong 741.4×
- 166Sha TinSha Tin, Hong Kong 741.4×
- 166NacimientoBiobio, Chile 741.4×
- 166AricaArica y Parinacota Region, Chile 741.4×
- 166MatsusakaMie, Japan 741.4×
- 171KeelungTaiwan, Taiwan 741.4×
- 172Botevgradlow-cost sensorsSofia, Bulgaria 741.4×
- 173AstanaAstana, Kazakhstan 731.4×
- 173YoukaichiShiga, Japan 731.4×
- 173Kan’onjichōKagawa, Japan 731.4×
- 176QuilpuéValparaiso, Chile 731.4×
- 176BizenOkayama, Japan 731.4×
- 178AlgiersAlgiers, Algeria 731.4×
- 178SugaiKyoto, Japan 731.4×
- 180Mueang NonthaburiNonthaburi, Thailand 731.4×
- 181UjiKyoto, Japan 721.4×
- 181CelayaGuanajuato, Mexico 721.4×
- 183CairoCairo, Egypt 721.4×
- 183Samut SakhonSamut Sakhon, Thailand 721.4×
- 183KameyamaMie, Japan 721.4×
- 183Ulu BedokSingapore 721.4×
- 183Abujalow-cost sensorsFCT, Nigeria 721.4×
- 183CoquimboCoquimbo Region, Chile 721.4×
- 189TakarazukaHyōgo, Japan 721.4×
- 189OkayamaOkayama, Japan 721.4×
- 189FukuchiyamaKyoto, Japan 721.4×
- 189Lat KrabangBangkok, Thailand 721.4×
- 189AsakuchiOkayama, Japan 721.4×
- 194Tin Shui WaiYuen Long, Hong Kong 721.3×
- 195TokiGifu, Japan 711.3×
- 195Duque de CaxiasRio de Janeiro, Brazil 711.3×
- 195TakashimaShiga, Japan 711.3×
- 195YamanashiYamanashi, Japan 711.3×
- 199ToyonakaOsaka, Japan 711.3×
- 199KobeHyōgo, Japan 711.3×
Top 200 of 1,581 shown.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Not covered: the government monitoring networks of China and Turkey, which publish no terms that let us reuse their readings. Most cities there are missing from this board, not clean. Why.
Use this board
SmogRank, most polluted cities, PM2.5, March 17, 2024, smogrank.com/history/2024-03-17 (accessed 3 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.